Flue-cleaning mechanism.



C. W. HERSHEY.

FLUE CLEANING MECHANISM.

APPLICATION r1120 APR. 19. 1917.

Patentadl Feb. 26, 918.

mm aim m ILII " 1 Wm M mm? WW5 my CHRISTIAN W. HERSHEY, 0F READING, PENNSYLVANIA.

ELITE-CLEANING MECHANISM.

To all whom it may concern: 1

Be it known that T, CHRISTIAN W. SHEY, a citizen of the United States, residing at Reading, in the count of Berks and. State of Pennsylvania, have invented oer-l tain new and useful Improvements in Fluel' Cleaning Mechanism, of which the follow-f ing is a specification.

I My invention relates to a boiler flue cleanil ing mechanism and my object is to provide;

a simple andeconomic device that will in-? sure the desired results, and may be readily? 4 installed and conveniently operated. Other:

objects will appear in the following specifi-f,

cation describing my invention in connectioni. wlth the accompanylng drawmgs, and the,

novel features are pointed out in the claims. Figure 1 1s a sectlonalslde elevation of;

4--4 of Fig. 3.

Figs. 5 and 6 are respectively a side and an end viewof one of the nozzles employed.

In the drawings 1 represents the fire-box, 2 the front wall, 3 the end of the boiler, 4 the boiler flues,-and 5 the smoke chamber of a well-known type of boiler construction.

To clean the boiler fiues 4, jets of steam are employed, from nozzles located adjacent the ends of the fiues and in communication with the steam supply, series of these nozzles being controlled by valves to give intermittent flow, so as to reverse the flow of products of combustion in only a few fiues at a time.

My improved device comprises a distributing pipe 10 arranged horizontally adjacent the end of the boiler 3, and spaced therefrom, as shown, by brackets 11. This pipe 10 is connected at one end by pipes 12, 13, 14, 15, and 16 to the main steam supply pipe 17 and its opposite end is closed by a cap 18. Controlling valves ma be inserted in the pipes one of which 19 ispreferably located, as shown on the outer face of the front wall 2 for convenient operation.

Specification of Letters Patent. Patented Feb. 26, 1918.

Application filed April 19, 1917.

Serial No. 163,127.

This distributing pipe 10, is preferably made up of alined sections of pipe having interposed fittings 20, 20, 20. The fittings shown are crosses with their outlets all lying in a plane parallel with the end of the boiler 3. To the bottom outlets 21, 21, 21 are secured extension pipes 22, 22, 22, which are preferably formed of pipe sections of diflierent sizes, as shown, and connected by Us to form section bends of substantially .S-shape, the ends of the extensions being closed by caps 23, 23, 23. These extensions depend in front of the fiues 4, and are provided with series of nozzles 25, one for each flue 4. Straps 24, 24, 24 from the pipe 10 support the overhanging portions of the extensions 22,22, 22.

Within each bottom outlet 21, of a fitting 20, as clearly shown in Figs. 3 and 4, is inserted a valve'seat rin 30, and the upper outlet 31 is provided Wltl'lil closure cap 32 forming a bearing for the stem 33 of a valve 34 adapted to seat in said ring 30. Secured to the outlet 31, by the cap 32, is a bracket 35 which forms a bearingfor acrank shaft 36 arranged parallel with the pipe 10. The crank portions 37, 37, 37, of this shaft 36 are adapted to rotate in cam rings 38, 38, 38, one of which is attached to the outer end of each valve stem 33. To keep the rings 38, 38, 38 inproper 21111611161113 at right angles to the cranks 37 37, 37, the valve stems are prevented from rotating by any well-known means such as making them square as indicated. The cranks 37, 37, 37 are inclined at different angles to the axis of the shaft 36, so that their rotation in the rings 38 will lift one valve at a time as shown.

To one end of the shaft 36 is secured a drive wheel 40, which is connected by drive belts 41, 42, to a crank wheel 43 located adjacent the valve 19 for controlling the sup ply of steam to the distributing pipe 10.

The nozzles 25 preferably employed in my device are indicated in Figs. 5 and 6, and consist as shown of a tube 25 having a nut portion 50 for screwing it into an extension pipe 22, 22, or 22. The end wall 51 is provided with a central opening 53, and outer inclined-slot apertures 54, 54, so that the steam jet will flow out in two spreading flat sprays that striking the cylindrical walls of the fiues 4, will cause them to whirl and ad- 'distributingzpipe or directly from the-steam supply may beprovided with nozzles on the top of theboiler for cleaning the upper sur- 7 face; of the latter.

What Iolaim is t I 1. In a boiler flue cleaning mechanism, a distributingipipe located Within the smoke chamber adjacentthe end of the boiler and communicating With the steam-supply, r'eturnbend extensions of said pipe each havinga series of nozzles arranged opposite the ends 01% the fines to be cleaned, a series of valves in said pipe controlling the flow of steam to the respective extensions, a crank shaft arranged parallel with saidpipe and adapted 'to operate said valves, and means outside the smoke chamber for actuating said crankshaft.

2. Ina boiler flue cleaning mechanism,'-a distributing pipe located Within the'smoke chamberadjacent the end of the boiler, a

steam'pipe communicating with said distributing pipe and having valve outside said'smoke chamber, return bend extensions of said distributing pipe each having a series of nozzles arrangedopposite the ends of the fines to be' cleaned, a series of valves in said distributingpipe controlling the-flow of steamto the respective extensions, a crank shaft arranged parallel with saiddistribut- Copies of this patent may be obtained for ing pipe and adapted to operate said valves,

and a drive belt connected to said crank shaft andextendedoutsidesaid smoke chamber, and a crank handle for operating said drive belt located adjacent the valve in said steam pipe.

'8. In a boiler flue cleaning mechanism a distributing pipe connected to the steam supply and comprisin alined pipe sections and interposed cross fittings, a return-bend extension from a vertical outlet of each fitting having a series of nozzles arranged=opposite the ends ofthe fiues to be (ElGttIlGClytl valve seat rin withinsaid vertical outlet, a-closure cap for the diametrically opposite outlet forming a valve stem bearing, a stemmed valve in said fitting adapted 'to seat on said ring and having acam ring on the stem extension outside said 'cap,-a crankshaft supported in parallel relation to said distributing pipe and having its.'crank portions adapted to rotate insaid cam rings,

and means to rotate said crank shaft.

l. In a boiler flue cleaningmechanisma distributing pipe connected to the steam supply and comprising alined .pipe'sections and interposed cross fittings, a return-bend extension from a vertical outlet of each fitting having a-s'eries of nozzles arrangedopposite the ends of the fines to be cleaned, a valve seat ring Withinsaid vertical outlet, a closure cap for the diametrically opposite outlet forming a valve stem bearing, a nonrotatable stemmed-valve in said fitting adapted to seat on said'ring and having a cam ring on the stem extension outside'said cap, a crank-shaft supported inparallel relation to said distributing pipe and having its cr'ankportionsadapted to rotate in said cam rings, and means to rotate said crank shaft.

In testimony whereof I aflix my signature.

CHRISTIAN HERSHEY.

five cents each, traddressing the Commissioner of Patents,

Washington, D. G. 

